Abstract
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Contributor Notes
Graduate Research Assistant. Now Assistant Professor, Dept. of Agronomy, Ohio State Univ., Columbus, OH 43210-1086.
Associate Professor. Now Professor and Head, Dept. of Agronomy, Pennsylvania State Univ., University Park, PA 16801.
Received for publication 8 June 1984. Contribution from the Univ. of Illinois Agr. Expt. Station, Urbana, IL 61801. The authors wish to acknowledge the financial support of the Illinois Agr. Expt. Station and the Dept. of Horticulture at the Univ. of Illinois. The cost of publishing this paper was defrayed in part by the payment of page charges. Under postal regulations, this paper therefore must be hereby marked advertisement solely to indicate this fact.
Abstract
